Bsi bs en 61332 2017

The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and ferrite materials.. EUROPEAN STANDARD NORME EUROPÉEN

Soft ferrite material classification

BSI Standards Publication

National foreword

This British Standard is the UK implementation of EN 61332:2017 It is identical to IEC 61332:2016 It supersedes BS EN 61332:2005 which is withdrawn

The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and ferrite materials

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of

a contract Users are responsible for its correct application

© The British Standards Institution 2017

Published by BSI Standards Limited 2017

ISBN 978 0 580 91120 0 ICS 29.100.10

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017

Amendments/corrigenda issued since publication Date Text affected

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 61332

February 2017

English Version Soft ferrite material classification

(IEC 61332:2016)

Classification des matériaux ferrites doux

(IEC 61332:2016) Werkstoffeigenschaften von Ferritmaterialien (IEC 61332:2016)

This European Standard was approved by CENELEC on 2016-12-23 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom

European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members

Ref No EN 61332:2017 E

EN 61332:2017

2

European foreword

The text of document 51/1146/FDIS, future edition 3 of IEC 61332, prepared by IEC/TC 51 "Magnetic components, ferrite and magnetic powder materials" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61332:2017

The following dates are fixed:

• latest date by which the document has to be implemented at

national level by publication of an identical national

standard or by endorsement

• latest date by which the national standards conflicting with

This document supersedes EN 61332:2005

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights

Endorsement notice

The text of the International Standard IEC 61332:2016 was approved by CENELEC as a European Standard without any modification

In the official version, for Bibliography, the following note has to be added for the standard indicated :

IEC 60401-3:2015 NOTE Harmonized as EN 60401-3:2016 (not modified)

EN 61332:2017

3

Annex ZA

(normative)

Normative references to international publications with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu

Vocabulary (IEV) - Chapter 221:

Magnetic materials and components

– 2 – IEC 61332:2016  IEC 2016

CONTENTS

FOREWORD 3

1 Scope 5

2 Normative references 5

3 Terms and definitions 5

4 Classification 5

4.1 Material classification 5

4.2 Main classes 6

4.3 Subclasses 6

5 Soft ferrite material classes 6

5.1 Materials used as impedances in interference suppression applications (IS class) 6

5.2 Materials used mainly in low flux density applications (B ≤ 5 mT) (SP class) 7

5.3 Materials used mainly in high flux density applications (PW class) 8

Bibliography 10

Table 1 – IS class ferrite materials 7

Table 2 – SP class ferrite materials 8

Table 3 – PW class ferrite materials 9

IEC 61332:2016  IEC 2016 – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

SOFT FERRITE MATERIAL CLASSIFICATION

FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees) The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”) Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter 5) IEC itself does not provide any attestation of conformity Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity IEC is not responsible for any services carried out by independent certification bodies

6) All users should ensure that they have the latest edition of this publication

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications 8) Attention is drawn to the Normative references cited in this publication Use of the referenced publications is indispensable for the correct application of this publication

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights IEC shall not be held responsible for identifying any or all such patent rights

International Standard IEC 61332 has been prepared IEC technical committee 51: Magnetic components, ferrite and magnetic powder materials

This third edition cancels and replaces the second edition published in 2005 This edition constitutes a technical revision

This edition includes the following significant technical changes with respect to the previous edition:

a) deleted "c" rank from subclass from Table 3, because of too large power loss density; b) added "a-wide" rank in subclasses PW3, PW4 and PW5 in Table 3;

c) changed "B" of PW3 class from 100 mT to 200 mT; "B × f" and "power loss density" have also

been changed;

d) changed "B" of PW4 class from 50 mT to 100 mT; "B × f" and "power loss density" have also

been changed

– 4 – IEC 61332:2016  IEC 2016 The text of this standard is based on the following documents:

FDIS Report on voting 51/1146/FDIS 51/1155/RVD

Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table

This document has been drafted in accordance with the ISO/IEC Directives, Part 2

The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific document At this date, the document will be

• reconfirmed,

• withdrawn,

• replaced by a revised edition, or

• amended

A bilingual version of this publication may be issued at a later date

IEC 61332:2016  IEC 2016 – 5 –

SOFT FERRITE MATERIAL CLASSIFICATION

1 Scope

This document specifies classification rules for soft ferrite materials used in inductive components (inductors and transformers) fulfilling the requirements of the electronic industries This document addresses the following issues for ferrite suppliers and users:

• cross-reference between materials from multiple suppliers;

• assistance to customers in understanding the published technical data in catalogues when comparing multiple suppliers;

• guidance to customers in selecting the most applicable material for each application;

• setting of nomenclature for IEC standards relating to ferrite;

• establishing uniform benchmarks for suppliers for performance in new development of materials

The numerical values given in this document are typical values of the parameters (properties) of the related materials Direct translation from the material specification into the core specification

is not always easy or possible

Every detailed material and core specification should be agreed upon between the user and the manufacturer

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

IEC 60050-221, International Electrotechnical Vocabulary – Chapter 221: Magnetic materials and

components

3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-221 apply ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/

• ISO Online browsing platform: available at http://www.iso.org/obp

4 Classification

4.1 Material classification

Soft ferrite materials may be classified according to the following basic parameters:

– 6 – IEC 61332:2016  IEC 2016

• initial permeability and relevant operation frequency and/or applicable maximum frequency;

• initial permeability as a function of the temperature;

• applicable maximum flux density and/or amplitude permeability;

• power loss at a given frequency, temperature and flux density;

• normalized impedance at a given frequency

4.2 Main classes

Soft ferrite materials may be divided into three main classes identified by two letters as follows:

• class IS materials are for use at AC low flux density as impedances in interference suppression (EMI) applications;

• class SP materials are for use at low flux density in signal processing applications;

• class PW materials are for use at high flux density (power application)

4.3 Subclasses

Each main class is divided into subclasses identified by two letters and a serial number

Ferrite manufacturers’ catalogues may indicate more than one class into which a material grade can fall, where desired

5 Soft ferrite material classes

5.1 Materials used as impedances in interference suppression applications (IS class)

These materials are mainly used in the shape of rods, tubes, beads, wide band chokes, bobbin cores and rings The relevant subclasses are given in Table 1

IEC 61332:2016  IEC 2016 – 7 –

Table 1 – IS class ferrite materials Subclasses Frequencya Normalized

impedanceb Initial permeabilityc Curie temperature

IS2a

IS3a

IS4a

IS5a

IS6a

IS7a

IS8a

IS9a

a The frequency is the measuring frequency of the normalized impedance

b Measured on a bead φ5 mm × φ2 mm × 10 mm and at a temperature of 25 °C

c µi is measured at ≤ 10 kHz, ≤ 0,5 mT µi is for reference only, indicating typical values seen µi is not a fundamental parameter for class IS materials

5.2 Materials used mainly in low flux density applications (B ≤ 5 mT) (SP class)

These materials are mainly used in the shape of ring-cores, pot-cores, EP-cores, RM-cores and E-cores The relevant subclasses are given in Table 2

– 8 – IEC 61332:2016  IEC 2016

Table 2 – SP class ferrite materials Subclasses Initial permeabilitya Relative loss

factora Frequencyb Curie temperature

SP10a

SP10b 6 000 to 8 000 6 000 to 8 000 ≤ 10 ≤ 3 0,01 0,01 > 120 > 120

SP11a

SP11b 8 000 to 12 000 8 000 to 12 000 ≤ 10 ≤ 3 0,01 0,01 > 100 > 100

SP12a

SP12b 12 000 to 16 000 12 000 to 16 000 ≤ 20 ≤ 6 0,01 0,01 > 100 > 100

NOTE The size of the test core is φ10 mm × φ6 mm × 4 mm

a µi and tanδ/µi are measured at 25 °C

b The frequency is the measuring frequency for tanδ/µi

5.3 Materials used mainly in high flux density applications (PW class)

These materials are mainly used in the shape of RM-cores, EFD-cores, ER-cores, ETD-cores, EER-cores, E-cores, PQ-cores, ring-cores and cores for planar applications The relevant subclasses are given in Table 3